Going by the advance booking for the movie Singham and packed shows on the first day, Global Advertisers has hit the nail on the head. India’s leading outdoor agency for film publicity, armed with strategic hoardings has done the unbelievable.Keeping Singham in the news and top of the mind against every available space in the city screaming Harry Porter & Zingadi Na Milegee Dobaara. No wonder, that’s how you differentiate the big daddy of outdoor advertising from the boys.